Calculation and Analysis of Seismic Capacity of RC Frame Structure with Inclined Columns
In order to study the seismic capacity of RC frame structure with inclined columns,ABAQUS finite element software was used to establish a numerical model of a RC frame with inclined columns.The monotonically increasing horizontal load was applied on the top of the frame to carry out Pushover analysis.The load-displacement curve,stiffness degradation curve,main tensile stress and equivalent plastic strain of the frame were obtained.The failure mode,yield mechanism,bearing capacity and lateral stiffness change of the frame during loading were analyzed.The results show that the foot regions of two columns in the frame are destroyed firstly under monotonic horizontal load,and shear failure occurs in the foot region of push-pull relative side,and compression failure occurs in the foot region of push-pull direction.In the early elastic stage,the stiffness degradation of the frame is fast,and the stiffness degradation is slow after reaching the yield stage.The vulnerable area is located at the foot of the left column,and the stiffness degradation is 1/14.3 of the initial stiffness.The frame has strong anti-pushing ability and good ductility.The research results can provide a basis for seismic design of frame with inclined columns.
frame with inclined columnreinforced concretedeformabilitymonotonic loadingpushover analysis
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